The first question would be "what do you want to do with your social media accounts?" Why do you want to create them?

Social media is for being social. If you have interesting things to share which lend themselves well to that kind of platform, then I'd have thought it would be quite easy to decide which would best suit the kind of content you have. If you're simply creating accounts for the sake of it, you're probably wasting your time.

i would suggest to create Facebook page for your website....also create account in google plus and LinkedIn which are also good social media platform to connect with members of same interest....you can use these platform for promotion of you blog or website...!!!

best social media websites to share knowledge are facebook , twitter , google plus , linkedin , tumblr , pinterest , instagram. we can use these websites to share images , videos , content and posts by making professional pages and can post in groups related to our category.

As @6PacksBradley suggested it depends on the techonolgy, service's else the business ur into.

but mostly we can consider promoting on Facebook, Twitter, G+. won't be any problem as there are no restrictions for promoting your business on the above platform, and considering Pinterest kinda of websites we need to make banners and images for promotion mostly. And LinkedIn is a professional Network were I guess it's not that easy to promote your business easily. But yes there is few website depending on the location country or the region u would like to target audience, scoop.it is one of the best sources for traffic and weheart.it is one more website just like Pinterest,

Listing various sites and saying "these are best" is of no help to anyone. Please take time to explain why you are recommending a particular site or sites over others. Explain how best to use your chosen site(s). Are different sites more suited to different business types?

There are a lot of best social media sites are available but facebook is the biggest social network and most of the peoples used to share the information. So facebook has a major role in social media world. In my opinion, google plus is the next one most of the people used.Whatsapp, snap chat are the social media apps most of the peoples using now. So this app is better for social publicity also.

Its More easier to reply if i know what type of website you having and what kind of data it having. If its about regional things you should use the social media account widely used in that region. its all upto who you targeted the website to. you already have twitter and facebook its a good choice. other best social media sites are:pinterest(image sharing),instagram(image sharing),google+.

Today most popular social media platform is Facebook, Google+, Linkedin, Twitter Pinterest, Reddit, Tumbler, Instagram and lot more... if you use daily this social media platform you can definitely reach your audience.

Listing various sites and saying "these are best" is of no help to anyone. Please take time to explain why you are recommending a particular site or sites over others. Explain how best to use your chosen site(s). Are different sites more suited to different business types?